On 2014-08-16, Clint Pachl <pa...@ecentryx.com> wrote: >> # cd /tftpboot >> # mkfifo etc/random.seed >> # while true; do dd if=/dev/random count=1 >etc/random.seed 2>/dev/null; >> done & > > # cd /tftpboot > # mkfifo test.seed > # while :; do dd if=/tmp/counter of=test.seed 2>/dev/null; done &
Careful! "dd ... >fifo" (O_WRONLY) blocks until there is a reader. By contrast, "dd ... of=fifo" (O_RDWR) does not block and if you run it in a loop, you'll end up with a busy loop. -- Christian "naddy" Weisgerber na...@mips.inka.de
